64 GLOSSARY. 



Hydroso'ma (Or. hudra, a water-dragon; soma, a body). The 



entire body of a Hydrozoon. 



Hydrothe'ca (Gr. hudra, a water-dragon ; theke, a repository). 

 The cell which in some Hydrozoa protects the hy- 

 dranth. 



Hydrozo'a (Gr. hudra, a water-dragon ; zoon, an animal). A 



division of the Ccelenterata, of which the Hydra is the type. 



Hyloba'tes (Gr. hide, a coppice ; baino, I walk). The Gibbons, 



a genus of the Anthropomorpha. 

 Hy'men (Gr. humen, a membrane). A membrane which 



partially closes the virgin vagina. 



Hyme'nium (Gr. humen, a membrane). The part of a mush- 

 room which bears the fructification. 

 Hymenop'tera (Gr. humen, a membrane; pteron, a wing). A 



group of the Insecta having scaleless wings. 

 Hyoglos'sus (Gr. hyoides, hyoid bone; glossa, the tongue). 



The name of a muscle having its origin in the hyoid bone, 



and its insertion in the tongue. 

 Hy'oid (Gr. v (the letter upsllon) ; eidos, shape). A small bone 



situated at the base of the tongue. 

 HyomandTbular (Gr. hyoides, hyoid bone ; I* mandible, the 



lower jaw). A term applied to the cartilage or bone 



which represents the proximal end of the hyoidean 



arch. 

 Hyoplas'tron (Gr. plastos, moulded). The second lateral piece 



of the plastron in the Chelonia. 

 Hypapfi'physis (Gr. hupo, under ; apophuo, I grow from). A 



process growing from the under surface of the bodies of 



the vertebras in some Vertebrata. 

 Hyperdicro'tic (Gr. huper, over, above ; dicrotos, striking on 



both sides). A term applied to the pulse when it is 



excessively dicrotic. 

 Hyperpha'sia (Gr. huper, over; phasis, speech). Want of 



control over the organs of speech. 



Hy'pertrpphy (Gr. huper, over; trcpho, I nourish). Over- 

 nutrition. An abnormal enlargement of the whole or part 



of the body. 

 Hy'pha (Gr. hyphc, a weaving). The name given to each of 



the filaments which in the fungi form the mycelium. 

 Hypoa'ria (Gr. hupo, under). A pair of small bodies on the 



ventral surface of the brain in fishes. 

 Hy'poblast (Gr. hupo, under; blaslos, a germ). The under 



layer of the blastoderm. 



